noeifevo 16 8v 10a lithium charger for 4s 14 8v li ion lipo batteries with lcd display cooling fan automatic shutdownDue to certain batteries with M25 charging ports that have integrated charging protocols, our charger cannot support batteries with built in charging protocols. Please confirm with the battery supplier before purchasing whether the battery has an integrated charging protocol. For M25 (2+1+5) and M25 (2+4), the standard polarity is 1+ for positive and 2 for negative. If you need a different polarity, please let us know. Contact options: You can reach